Mollisols are specifically characterized by: a deep surface horizon that is dark
ID: 120917 • Letter: M
Question
Mollisols are specifically characterized by:
a deep surface horizon that is dark in color due to high organic matter content.
high content of shrinking and swelling clay.
a well developed Bt horizon.
All of the above.
Only B and C.
A profile with the master horizons and subordinate desgnations of A, Bss, Bssg has likely:
accumulated a large percentage of organic matter in the B horizons.
a very young and dry soil.
Is saturated often enough in the bottom horizon to cause gleying and mottling.
accumulated a large percentage of shrinking and swelling clay in the A horizo
Mollisols are specifically characterized by:
Answers: A.a deep surface horizon that is dark in color due to high organic matter content.
B.high content of shrinking and swelling clay.
C.a well developed Bt horizon.
D.All of the above.
E.Only B and C.
A profile with the master horizons and subordinate desgnations of A, Bss, Bssg has likely:
Answers: A.
accumulated a large percentage of organic matter in the B horizons.
B.a very young and dry soil.
C.Is saturated often enough in the bottom horizon to cause gleying and mottling.
D.accumulated a large percentage of shrinking and swelling clay in the A horizo
Explanation / Answer
defining diagnostic feature of Mollisols is deep surface horizon that is dark in color due to high organic matter content which is nutrient-enriched surface soil (A horizon), typically between 60–80 cm in depth and is known as mollic epipedon. Therefore "A." is correct answer.
A horizon, also known as topsoil, is the surface mineral layer where organic matter accumulates.B horizon, also known as subsoil or "zone of accumulation". s means Illuvial accumulation of both sesquioxides and organic matter.g means Strong gleying and mottled, the color of reduced (nonoxidized) iron, resulting from saturated conditions. As per this defination the correct answer is "A." as there is accumulated a large percentage of organic matter in the B horizons as B horizons are represented as Bss and Bssg which means B has characteristics of s and g.
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